<template>
  <div class="app-container">
    讲师表单
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO (TODO 表示这个版块还需要去修改完善) -->
      <el-form-item label="讲师头像">

            <!-- 头衔缩略图 -->
            <pan-thumb :image="teacher.avatar"/>
            <!-- 文件上传按钮 -->
            <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
            </el-button>

            <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 
          <input type="file" name="file"/>
        -->
            <image-cropper
                          v-show="imagecropperShow"
                          :width="300"
                          :height="300"
                          :key="imagecropperKey"
                          :url="BASE_API+'/eduoss/fileoss'"
                          field="file"
                          @close="close"
                          @crop-upload-success="cropSuccess"/>
        </el-form-item>

        <el-form-item>
          <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
        </el-form-item>
     </el-form>

  </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: { ImageCropper, PanThumb },
    data() {
        return {
          teacher:{
            name: '',
            sort: 0,
            level: 1,
            career: '',
            intro: '',
            avatar: ''
          },
          //上传弹框组件是否显示
          imagecropperShow:false,
          imagecropperKey:0,//上传组件key值
          BASE_API:process.env.BASE_API, //获取dev.env.js里面地址
          saveBtnDisabled:false  // 保存按钮是否禁用,
        }
    },
    created() {
        this.init()
    },
    watch: { // 监听
        $route(to, from) { //路由发生变化，方法就会执行
            this.init()
        }
    },
    methods: {
        close() { // 关闭上传弹框的方法
            this.imagecropperShow = false
            this.imagecropperKey = this.imagecropperKey + 1  // 对上传组件进行初始化操作
        },
        cropSuccess(data) { // 上传成功的方法
            console.log(data)
            this.teacher.avatar = data.url
            this.imagecropperShow = false
            this.imagecropperKey = this.imagecropperKey + 1  // 对上传组件进行初始化操作
        },
        init() {
            if(this.$route.params && this.$route.params.id) {
                // 从路径获取id值
                const id = this.$route.params.id
                // 调用根据id查询方法
                this.getInfo(id)
            } else {
                this.teacher = {}
            }
        },
        saveOrUpdate() {
            if(this.teacher.id) {
                // 修改
                this.updateTeacher()  
            } else {
                // 添加
                this.saveTeacher()           
            }
        },
        // 添加讲师方法
        saveTeacher() {
            teacherApi.addTeacher(this.teacher)
            .then(response => {
                // 添加成功
                this.$message({
                    type: 'success',
                    message: '添加成功'
                })
                // 回到列表信息  需要使用路由跳转
                this.$router.push({path:'/teacher/table'})
            })
        },
        // 根据讲师id查询的方法
        getInfo(id) {
            teacherApi.getTeacherInfo(id)
            .then(response => {
                this.teacher = response.data.teacher
            })
        },
        // 修改讲师方法
        updateTeacher() {
            teacherApi.updateTeacherInfo(this.teacher)
            .then(response => {
                this.$message({
                    type: 'success',
                    message: '修改成功',
                })
                this.$router.push({path:'/teacher/table'})
            })
        }
    },
}
</script>

